Thermostatic valve.



E. S- CALDWELL.

THERMOSTATIC VALVE.

APPLICATION FILED SEPT-25. I91 I.

1,149,182. Patnted Aug. 10, 1915.

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Bosnian s. CALDWELL, or rnrtaiinnrnre, PENNSYLVANIA.

rnnaivrosrarrc VALVE.

it Specification of Letters Patent. PatQ11tBd.Allg.10, 1915 Applicationfileas temberas, 1911. Serial No. 651,273.

ToaZZ whom it concern; 1 1- ing isa specification. I, a y I 7' Myinvention relates to thermostatic valves and it has particular relationto device adapted toautomatically passthe air and water of condensationfrom steamrachators or other steam heated appliances.

The principal ob] ect of my nvention isto provide an improved form ofdevice for automatically permitting. the'air and water of condensationto drain from steam heated appliances, but which will. prevent the'pas--sage of live steam from the apparatus, the

operation being effected by the high temperature of the steam acting ona thermostatic tube.

A further object of my invention is to provide a device whichfmay bereadily opened and dismantled for the purpose of examination or repair,and which is provided with'means'supporting the valve and associatedparts in such manner as to'insure the proper readjustment of the valvein the event of the same being dismantled for any purpose.

My invention also contemplates means for detecting improper escape ofsteam through the apparatus and further contemplates certain improveddetails of construction as will later appear. i

The nature and characteristic features of my invention will be more.readily underthis view beingtake'n' approximately on the line 3-3 ofFig. 1.

Referring to the drawings, in the particular embodiment of my inventionthere shown, 4 is the casing or housing having a cover or cap 5 suitablysecured thereto by meansof the bolts engageears' t' and 8 carriedrespectively by the housing a and i its cover Thelower edge of thecover'5' has a lip 9 which extends into a comple- "mental groove 10 in thehousing 4, which groove also contains a suitable gasket ll jto form aneffective seal against the passageof liquids or vapors; The housing isprovidedwith an inlet 12 threaded on its exter ior and which is engagedby a suitable union nut 13 and nipple 1 1 for securing thedevice incommunication with the radiator or other steam heated appliance inconnection with which it is-adapted to be used. Mounted in the interiorof the inlet 12is a bushing 15, tapered on its exterior and itsinnerinterior edge serving as a valve seat. Mounted within'the housing4, in alinement with the inlet 12, is a stud or guide stem 16 whichis'in threaded engagement with the housing 4 forminga means of supportfor p the valve in a manner to be presently explained. The inner end ofthe stud or guide.

stem 16 extends in proximity to the inlet'12 and is reduced in diameteras atr17 to form a. guide upon which the hollow stem 18 of the valve 19is 'slidably mounted, the an rangement being such as to support thevalve 19 adjacent its seat yet permitting the same to move freely underthe thermostatic control hereinafter described. The stud 16 s grooved asat 20, and the valve stem 18 is provided with a collar 21 so as to forma similar groove 22, the other wall of said grooveobeing provided by therear face of the valve 19.

23 is an inverted U-shaped thermostatic tube which may be of the wellknown construction of such tubes being flat or elliptical in crosssection and containing a quantity of fluid which will vaporize when apredetermined temperature is reached, so that the pressure caused by thevaporization of the contained fluid will set up a tendency of the tubetostraighten itself and thereby cause the distance between the two armsthereof to be appreciably increased. Each arm of the thermostatic tube23 carries at its lower end a bifurcated engaging member 24 and 25 whichmembers 24 and 25 extend into the channels or grooves 20 and 22respectively on the stud 16jand valve stem 18.- The engaging members 24:and 25 each have their lower ends formed into a blunt point from whichthe front and rear faces extend upwardly in diverging planes to bearing1 upwardly and disengage themselves; fioih' w ich itehgagesthe:stt1d= l6and valve 18: aeab'o've Samoan.

' fer'the' pur pos'e of repailf of eieama the" stadi 16" may always beretarnedte'its pidjjer" p'ositiibh Without any particular skill 116mgreq'ai'feet on the part ofthe maaipuIatm-Q At the upper end of the'ccverer H415 of points at the place of greatest Width cf engaging membersandiwhich bearing points engage the side faces of g fb'ves' Ofch'a fi nels20 and 22 in a plane 'below the aegis f 'j the stud and valve, thisarrangement belng PIjOVldGd' so that there will be no tendency of thebiflircated Inemhers' 24 and 25 to ride their respective grooves orchannels 20 and 22.- It will be s'eeh -that' the therriibstaticf wee 23may be readily ifis'e'rt etli and i eiiidy'ecl when clesii filonae'coiint' cf'the mane? The Outer? we of the sea-a Gaga-[a5 steni 16ispfdvid'edwith head Or' 1 111 1; 27 which] v mayifi desifed'hem'adein'tegial, with the 5 stud 1610111; Which for coiiyefiien'ce ofm'an tufactu 're is prefei ablymaee as a threa-(lecl tint mounted 'on extendedportionof the of the" a ljustfnentof the" valve 19'; as inthe event ofthe temp'ci ary remval dfth'e' same thehousing 4t thei'e is a threadedaperture 29 which is 'ndrmally' closed? by aplu'g e1- belt 30; thisaffangement'being prvid'd so that 05 m a! thiepa'tent mlj ie' bbtaint!for. five ceiits ca t; addresingthe 60 5111185101 mam,

improperspassagesof steam past the valve 19 may bereadily ascertained bythe .passipg -tla eyal e 19 it Will beat once indicated at the aperture29. It will of course be understood that the air and Water which. 7passes the Valve 19 will pass on thfilgh the system through the'oi1tlet31.

refiidval of thetel't 30' afic'l if any steam be 7 i Having thusdescribed the natufe and characteristic features of my invention What- Iclaiin as new anl desirei te 'secere by Lette'is Pateiitgisi a In devicecf'the' chafacter described liclising; angirilet; stil'dsiipp T-ted said'hms'iiig' al inementwith sztldihlt; a valve slidably ineufitetl 6n"and'sapportee by said stud and adapted to clos'ethe" inlet, andinver'tecl U shaped therincstatietfibe hayihg biftffcated engagingmembers at the end-"of each arm; the stud and the-" alVe'each haV- ing ag'r'edve 01 the reception o t-said time cate l efigagir'ig members, Isaicl engaging? member's having/enlarged bearing portiohs stud -an1I-v'a l ve only at Points below thea-xis of said sttid' ane' valye." N

engaging the'side faces 51 thegroeves-in-the;

"In! testimony VvlifefeofiI haye hereunto' sighed namei n the firesenceof We messes."

Witnesses: g 2 I 'W: T. Helms; I 'WIL IAM- S.'"'A:vemsem:

ywashtngton nth sJeALDWELi-j 1

